Daniel Radcliffe's new cinematic ghost story is about to become the subject of a spooky London amble.Great British Tours' London Ghost Walk now features the history of the city's Woman in Black - the All Hallows Church spectre which inspired Harry Potter star Radcliffe's much-anticipated period chiller. The ghost walk also features London's most spooky pub, the haunted history of the Tower of London and details of the sightings of Jack The Ripper's ghost.